refactor(mock): convert mock ids to numeric strings

lib/types.ts

@@ -1,9 +1,13 @@
-export type UserRole = "consumer" | "player" | "owner"
+// All `id` fields come from backend snowflake int64.
+// Frontend stores them as strings to avoid JS number precision issues.
+
+export type UserRole = "consumer" | "player" | "owner" | "admin"
 export type VerificationStatus = "pending" | "approved" | "rejected"
 
 export interface User {
   id: string
   username: string
+  email?: string
   nickname: string
   avatar: string
   role: UserRole
@@ -29,7 +33,7 @@ export interface PlayerService {
   title: string
   description: string
   price: number
-  unit: "局" | "星" | "次"
+  unit: string
   rankRange?: string
   availability: string[]
 }